The original question was incompletely defined. Was the curve right or left handed ? What were the constraints ? How fast was the train going and relative to what .

The train's speed was 60 MPH as was that of all the principals. The caboose had a direct line of sight to the engineer. The tricky part is the muzzle velocity of 60 and 100 MPH. The rounds will traveler towards the engineer at that speed out of the muzzle but how much it will slow in the air is above my pay grade.

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How about the same situation with a tra1n traveling at the speed of light?

Dr. Hawking explains this very well in his Universe documentary. I think he said time would go slower in the train than outside, quite interesting.

I was thinking about the speed of the train being added to the speed of a bullet fried from said train. If said train was travailing at the speed of light no speed could be added to the bullet so it would never leave the gun much less reach the engineer; .

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How about the same situation with a tra1n traveling at the speed of light?

Dr. Hawking explains this very well in his Universe documentary. I think he said time would go slower in the train than outside, quite interesting.

I was thinking about the speed of the train being added to the speed of a bullet fried from said train. If said train was travailing at the speed of light no speed could be added to the bullet so it would never leave the gun much less reach the engineer; .

So would it blow your head off?

So would it blow your head off?

I was thinking about that. As the shooter in the caboose is not aiming in the direction of travel but across the arc of the curve the train is rounding it may be able to slide out of the gun at less than the speed of light. I then stopped thinking.

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Since you, the train, the gun, and the conductor are all moving the same speed there are no relativistic effects. From the point of view of anyone on the train the bullet would leave the gun and travel normally.

From the point of view of someone beside the tracks as the speed-of-light train whips past, everyone and everything on the train is frozen in time so indeed, from that person's perspective, the bullet never leaves the gun.

Since you, the train, the gun, and the conductor are all moving the same speed there are no relativistic effects. From the point of view of anyone on the train the bullet would leave the gun and travel normally.

Don't forget nothing can travel faster than the speed of light so everything on the train is going as fast as the laws of physics permit. That is universal whether moving or not relative go other objects.

A train is traveling at 100 MPH with a light on; that light is traveling the speed of lihgt relative to the observer on the ground not the speed of light plus 100 MPH. Unlike a train only moving at the muzzle velocity of a bullet.
What would happen if you fired a gun on a train moving as fast as a bullet?

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Interesting read on Einstein's Theory of Relativity:

Why you can't travel faster than the speed of light

[edit] Or why you can't even travel at the speed of light.

Einstein took this idea – the invariance of the speed of light – as one of his two postulates for the special theory of relativity. The other postulate was that the laws of physics are the same wherever you are, whether on an plane or standing on a country road. But to keep the speed of light constant at all times and for all observers, in special relativity, space and time become stretchy and variable. Time is not absolute, for example. A moving clock ticks more slowly than a stationary one. Travel at the speed of light and, theoretically, the clock would stop altogether.

any extra energy you put into an object does not make it move faster but just increases its mass.

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any extra energy you put into an object does not make it move faster but just increases its mass.

in reverse.

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Speed of light slower than we think?

"If the physicist is correct, it means scientists have to recalculate everything from our distance to the sun to some of the most distant objects seen in other galaxies.

Dr Franson’s paper has been submitted to the New Journal of Physics and is currently undergoing peer review."

If proven to be correct, just how much more of Einstein's work will be in doubt?

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Doctor James Franson will have a lot of questions to answer but I doubt if he will really be taken serious like Einstein was.

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The Big Bang itself expanded much faster than the speed of light. But this only means that "nothing can go faster than light." Since nothing is just empty space or vacuum, it can expand faster than light speed since no material object is breaking the light barrier. Therefore, empty space can certainly expand faster than light.

Agree, for that makes sense. But at the start of big bang was matter also being
created. If so then it's rate of expansion would have been limited to that
within the constraints of Einstein's law. Question, "What was the speed of light
during big bang"? Was it much slower than it is now, if so there's every
possibility that matter could then have travelled in excess of the speed of light.

Even Einstein was not totally happy with the constant he gave for the speed
of light, was he. I believe he was right to have been suspicious regarding this
constant.

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The Kite Fliers

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Kite fliers: An imaginary club of solo members, those who don't yet
belong to a formal team so "fly their own kites" - as the saying goes.

The Cebit2 results are much in doubt today.We are still waiting for the Planck results, to be announced in October. My friend Roberto Battiston, one of the proposers of AMS-2 experiment on the ISS, has promised me to give a summary of the Planck results on his blog in "Le Scienze" online magazine. But since he has been nominated as president of the Italian Space Agency he must have his hands full now.
Tullio

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